Symantec 5 manual Setting up shared storage, See About setting up disk-based I/O fencing on

46Preparing to install VCS Performing preinstallation tasks

4When the command prompts, enter a passphrase and confirm it.

5Change the permissions of the .ssh directory by typing:

# chmod 755 ~/.ssh

6The file ~/.ssh/id_dsa.pub contains a line that begins with ssh_dss and ends with the name of the system on which it was created. Copy this line to the /root/.ssh/authorized_keys2 file on all systems where you plan to install VCS.

If the local system is part of the cluster, make sure to edit the authorized_keys2 file on that system.

7Run the following commands on the system where you are installing:

#exec /usr/bin/ssh-agent $SHELL

#ssh-add

This step is shell-specific and is valid for the duration the shell is alive.

8When the command prompts, enter your DSA passphrase.

You are ready to install VCS on several systems in one of the following ways:

■Run the installvcs program on any one of the systems

■Run the installvcs program on an independent system outside the cluster

To avoid running the ssh-agent on each shell, run the X-Window system and configure it so that you are not prompted for the passphrase. Refer to the Red Hat documentation for more information.

9To verify that you can connect to the systems where you plan to install VCS, type:

#ssh -x -l root north ls

#ssh -x -l root south ifconfig

#ssh-copy-id -i ~/.ssh/id_dsa.pub root@north

The commands should execute on the remote system without having to enter a passphrase or password.

Setting up shared storage

For VCS I/O fencing, the data disks must support SCSI-3 persistent reservations. You need to configure a coordinator disk group that supports SCSI-3 PR and verify that it works.

See “About setting up disk-based I/O fencing” on page 89.